X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=unittests%2FSupport%2FAllocatorTest.cpp;fp=unittests%2FSupport%2FAllocatorTest.cpp;h=7f15776d6f007797d4510803a8bda8575019a9bc;hp=616f8af3415f847caf240a26114df731e90f42b2;hb=3f0922729280ea435e1e1df8eabb12d068f27263;hpb=4f240010fdea1fcbe7dac3c8e9ebad082e4036c2

diff --git a/unittests/Support/AllocatorTest.cpp b/unittests/Support/AllocatorTest.cpp
index 616f8af3415..7f15776d6f0 100644
--- a/unittests/Support/AllocatorTest.cpp
+++ b/unittests/Support/AllocatorTest.cpp
@@ -118,10 +118,11 @@ TEST(AllocatorTest, TestSmallSlabSize) {
 // Test requesting alignment that goes past the end of the current slab.
 TEST(AllocatorTest, TestAlignmentPastSlab) {
   BumpPtrAllocator Alloc;
-  Alloc.Allocate(1234, 1);
+  Alloc.Allocate(4095, 1);
 
-  // Any attempt to align the pointer in the current slab would move it beyond
-  // the end of that slab.
+  // Aligning the current slab pointer is likely to move it past the end of the
+  // slab, which would confuse any unsigned comparisons with the difference of
+  // the the end pointer and the aligned pointer.
   Alloc.Allocate(1024, 8192);
 
   EXPECT_EQ(2U, Alloc.GetNumSlabs());